The snow that fell Saturday piled a couple of feet high throughout much of New Hampshire. While the snow tended to be light and powdery, officials warned that rain that fell Monday could quickly weigh it down.

Maintenance crews with CP Management Inc., which cares for about 17 buildings at Pease International Tradeport, worked to clear roofs Monday as the rain came down.

"There's a huge amount of snow on the roofs that's causing a lot of weight, and then with the rain, it's just compounding the weight and causing it to be even heavier," said Lesley Marcotte of CP Management.

The snow that fell over the weekend has piled unevenly on many roofs, safety officials said.

"Because of the amount of snow we got the other day, a lot of it is concentrated in drifts, as opposed to where a roof is designed to have it lay out across the whole roof," said Dover Fire Chief Richard Driscoll.

Driscoll said business should try to distribute the snow, especially on flat roofs. Some residences may also be at risk.

"Three-season porches and added rooms sometimes have a flatter roof structure, and that allows the snow to build up more," he said.

Bigger industrial buildings usually have a drainage system in place. Driscoll said those systems should be checked to make sure they're clear.

Because of the danger involved with clearing roofs, residents were encouraged to get professional help.

"The biggest thing we want to encourage people is if you can't do it safely and you don't feel comfortable up there, get a licensed contractor to do it to avoid anyone getting injured," Driscoll said.

News 9 attempted to contact three contractors who listed roof snow-removal services, but all were busy, a possible indication that their services were being used Monday.